Polymeric fungicidal compositions containing the trichloromethyl thioimide moiety

Abstract

A polymer having fungicidal properties is prepared from a styrene maleic copolymer resin by converting the maleic portion of the resin to an imide and further reacting the imide with perchloromethyl mercaptan.

I claim: 
     
       1. A Polymeric, resinous fungicide consisting essentially of repeating units having the formula: ##EQU4## where n is 2 to 6 and m is 1 to 3. 
     
     
       2. A method of preparing a polymeric, resinous fungicide having pendant n-trichloromethylthioimide groups which comprises: a. converting the anhydride groups of a styrene-maleic anhydride copolymer resin to imide groups by heating said copolymer resin at temperatures from 200° to 300° C. with sufficient ammonia or ammonium hydroxide to convert the anhydride moiety to an imide moiety,   b. forming the alkali metal salt of said imide moiety by treating the imidized resin with enough alkali metal hydroxide to react with the imide moiety,   c. converting the alkali metal salt of said imide moiety to a n-trichloromethylthioimide moiety by reacting said alkali metal salt with perchloromethyl mercaptan sufficient to convert the alkali metal salt of the imidized resin to a n-trichloromethylthioimide moiety.